
#include <machine/asm.h>

/*
 * Byte-swap a 4-byte quantity.  (Convert 0x01234567 to 0x67452301.)
 *
 * Argument is an unsigned 4-byte integer (uint32_t).
 */
#if defined(_KERNEL) || defined(_STANDALONE)
#define	BSWAP32	bswap32
#else /* defined(_KERNEL) || defined(_STANDALONE) */
#define	BSWAP32	__bswap32
#endif /* defined(_KERNEL) || defined(_STANDALONE) */
LEAF(BSWAP32, 1)		/* a0 contains 0x01234567 */
XLEAF(htonl, 1)
XLEAF(ntohl, 1)
	insbl	a0, 3, t0	/* t0 = 0x67       */
	extbl	a0, 1, t1	/* t1 = 0x      45 */
	extbl	a0, 2, t2	/* t2 = 0x      23 */
	extbl	a0, 3, t3	/* t3 = 0x      01 */
	sll	t1, 16, t1	/* t1 = 0x  45     */
	sll	t2, 8, t2	/* t2 = 0x    23   */
	or	t3, t0, v0	/* v0 = 0x67    01 */
	or	t1, t2, t1	/* t1 = 0x  4523   */
	or	t1, v0, v0	/* v0 = 0x67452301 */
	RET
END(BSWAP32)
